Full Support for Compiler Types - Using and Porting GNU Fortran

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15.3.9 Full Support for Compiler Types

g77 doesn't support INTEGER, REAL, and COMPLEX equivalents for all applicable back-end-supported types (char, short int, int, long int, long long int, and long double). This means providing intrinsic support, and maybe constant support (using F90 syntax) as well, and, for most machines will result in automatic support of INTEGER*1, INTEGER*2, INTEGER*8, maybe even REAL*16, and so on.